Truck cab



FIG. 1 is a perspective view of the top, front and left side of a truck cab showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is an enlarged front elevation view thereof;

FIG. 5 is a rear elevation view thereof; and

FIG. 6 is a top plan view thereof. 

The ornamental design for a truck cab, as shown. 